| /* |
| * Copyright (c) 2019, Alliance for Open Media. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include <arm_neon.h> |
| |
| #include "config/aom_dsp_rtcd.h" |
| #include "aom/aom_integer.h" |
| #include "aom_dsp/arm/sum_neon.h" |
| #include "av1/common/arm/mem_neon.h" |
| #include "av1/common/arm/transpose_neon.h" |
| |
| unsigned int aom_avg_4x4_neon(const uint8_t *a, int a_stride) { |
| const uint8x16_t b = load_unaligned_u8q(a, a_stride); |
| const uint16x8_t c = vaddl_u8(vget_low_u8(b), vget_high_u8(b)); |
| #if defined(__aarch64__) |
| const uint32_t d = vaddlvq_u16(c); |
| return (d + 8) >> 4; |
| #else |
| const uint32x2_t d = horizontal_add_u16x8(c); |
| return vget_lane_u32(vrshr_n_u32(d, 4), 0); |
| #endif |
| } |
| |
| unsigned int aom_avg_8x8_neon(const uint8_t *a, int a_stride) { |
| uint16x8_t sum; |
| uint32x2_t d; |
| uint8x8_t b = vld1_u8(a); |
| a += a_stride; |
| uint8x8_t c = vld1_u8(a); |
| a += a_stride; |
| sum = vaddl_u8(b, c); |
| |
| for (int i = 0; i < 6; ++i) { |
| const uint8x8_t e = vld1_u8(a); |
| a += a_stride; |
| sum = vaddw_u8(sum, e); |
| } |
| |
| d = horizontal_add_u16x8(sum); |
| |
| return vget_lane_u32(vrshr_n_u32(d, 6), 0); |
| } |
| |
| int aom_satd_lp_neon(const int16_t *coeff, int length) { |
| const int16x4_t zero = vdup_n_s16(0); |
| int32x4_t accum = vdupq_n_s32(0); |
| |
| do { |
| const int16x8_t src0 = vld1q_s16(coeff); |
| const int16x8_t src8 = vld1q_s16(coeff + 8); |
| accum = vabal_s16(accum, vget_low_s16(src0), zero); |
| accum = vabal_s16(accum, vget_high_s16(src0), zero); |
| accum = vabal_s16(accum, vget_low_s16(src8), zero); |
| accum = vabal_s16(accum, vget_high_s16(src8), zero); |
| length -= 16; |
| coeff += 16; |
| } while (length != 0); |
| |
| { |
| // satd: 26 bits, dynamic range [-32640 * 1024, 32640 * 1024] |
| const int64x2_t s0 = vpaddlq_s32(accum); // cascading summation of 'accum'. |
| const int32x2_t s1 = vadd_s32(vreinterpret_s32_s64(vget_low_s64(s0)), |
| vreinterpret_s32_s64(vget_high_s64(s0))); |
| const int satd = vget_lane_s32(s1, 0); |
| return satd; |
| } |
| } |
| |
| void aom_int_pro_row_neon(int16_t hbuf[16], const uint8_t *ref, |
| const int ref_stride, const int height) { |
| int i; |
| const uint8_t *idx = ref; |
| uint16x8_t vec0 = vdupq_n_u16(0); |
| uint16x8_t vec1 = vec0; |
| uint8x16_t tmp; |
| |
| for (i = 0; i < height; ++i) { |
| tmp = vld1q_u8(idx); |
| idx += ref_stride; |
| vec0 = vaddw_u8(vec0, vget_low_u8(tmp)); |
| vec1 = vaddw_u8(vec1, vget_high_u8(tmp)); |
| } |
| |
| if (128 == height) { |
| vec0 = vshrq_n_u16(vec0, 6); |
| vec1 = vshrq_n_u16(vec1, 6); |
| } else if (64 == height) { |
| vec0 = vshrq_n_u16(vec0, 5); |
| vec1 = vshrq_n_u16(vec1, 5); |
| } else if (32 == height) { |
| vec0 = vshrq_n_u16(vec0, 4); |
| vec1 = vshrq_n_u16(vec1, 4); |
| } else if (16 == height) { |
| vec0 = vshrq_n_u16(vec0, 3); |
| vec1 = vshrq_n_u16(vec1, 3); |
| } |
| |
| vst1q_s16(hbuf, vreinterpretq_s16_u16(vec0)); |
| hbuf += 8; |
| vst1q_s16(hbuf, vreinterpretq_s16_u16(vec1)); |
| } |
| |
| int16_t aom_int_pro_col_neon(const uint8_t *ref, const int width) { |
| const uint8_t *idx; |
| uint16x8_t sum = vdupq_n_u16(0); |
| |
| for (idx = ref; idx < (ref + width); idx += 16) { |
| uint8x16_t vec = vld1q_u8(idx); |
| sum = vaddq_u16(sum, vpaddlq_u8(vec)); |
| } |
| |
| #if defined(__aarch64__) |
| return (int16_t)vaddvq_u16(sum); |
| #else |
| const uint32x4_t a = vpaddlq_u16(sum); |
| const uint64x2_t b = vpaddlq_u32(a); |
| const uint32x2_t c = vadd_u32(vreinterpret_u32_u64(vget_low_u64(b)), |
| vreinterpret_u32_u64(vget_high_u64(b))); |
| return (int16_t)vget_lane_u32(c, 0); |
| #endif |
| } |
| |
| // coeff: 16 bits, dynamic range [-32640, 32640]. |
| // length: value range {16, 64, 256, 1024}. |
| int aom_satd_neon(const tran_low_t *coeff, int length) { |
| const int32x4_t zero = vdupq_n_s32(0); |
| int32x4_t accum = zero; |
| do { |
| const int32x4_t src0 = vld1q_s32(&coeff[0]); |
| const int32x4_t src8 = vld1q_s32(&coeff[4]); |
| const int32x4_t src16 = vld1q_s32(&coeff[8]); |
| const int32x4_t src24 = vld1q_s32(&coeff[12]); |
| accum = vabaq_s32(accum, src0, zero); |
| accum = vabaq_s32(accum, src8, zero); |
| accum = vabaq_s32(accum, src16, zero); |
| accum = vabaq_s32(accum, src24, zero); |
| length -= 16; |
| coeff += 16; |
| } while (length != 0); |
| |
| // satd: 26 bits, dynamic range [-32640 * 1024, 32640 * 1024] |
| #ifdef __aarch64__ |
| return vaddvq_s32(accum); |
| #else |
| return horizontal_add_s32x4(accum); |
| #endif // __aarch64__ |
| } |
| |
| int aom_vector_var_neon(const int16_t *ref, const int16_t *src, const int bwl) { |
| int32x4_t v_mean = vdupq_n_s32(0); |
| int32x4_t v_sse = v_mean; |
| int16x8_t v_ref, v_src; |
| int16x4_t v_low; |
| |
| int i, width = 4 << bwl; |
| for (i = 0; i < width; i += 8) { |
| v_ref = vld1q_s16(&ref[i]); |
| v_src = vld1q_s16(&src[i]); |
| const int16x8_t diff = vsubq_s16(v_ref, v_src); |
| // diff: dynamic range [-510, 510], 10 bits. |
| v_mean = vpadalq_s16(v_mean, diff); |
| v_low = vget_low_s16(diff); |
| v_sse = vmlal_s16(v_sse, v_low, v_low); |
| #if defined(__aarch64__) |
| v_sse = vmlal_high_s16(v_sse, diff, diff); |
| #else |
| const int16x4_t v_high = vget_high_s16(diff); |
| v_sse = vmlal_s16(v_sse, v_high, v_high); |
| #endif |
| } |
| #if defined(__aarch64__) |
| const int mean = vaddvq_s32(v_mean); |
| const uint32_t sse = (uint32_t)vaddvq_s32(v_sse); |
| #else |
| const int mean = horizontal_add_s32x4(v_mean); |
| const uint32_t sse = (uint32_t)horizontal_add_s32x4(v_sse); |
| #endif |
| // (mean * mean): dynamic range 32 bits - can be stored in uint32_t |
| const uint32_t meansq = (uint32_t)abs(mean) * (uint32_t)abs(mean); |
| const int var = sse - (int)(meansq >> (bwl + 2)); |
| return var; |
| } |